module path_name is not in module chain

    Facility: DEBUG, VMS Debugger

    Explanation: The module path_name, specified in the SET MODULE
    command, does not exist in the image. This message can be caused
    when: (1) a module name has been entered incorrectly or (2) a
    module is compiled with the /NOTRACE switch.

    User Action: Specify a module that is in the image.